EP0228201A2 - Handbetätigter Palettenwechsler - Google Patents

Handbetätigter Palettenwechsler Download PDF

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Publication number
EP0228201A2
EP0228201A2 EP86309467A EP86309467A EP0228201A2 EP 0228201 A2 EP0228201 A2 EP 0228201A2 EP 86309467 A EP86309467 A EP 86309467A EP 86309467 A EP86309467 A EP 86309467A EP 0228201 A2 EP0228201 A2 EP 0228201A2
Authority
EP
European Patent Office
Prior art keywords
pallet
turntable
supporting portions
work
stopper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86309467A
Other languages
English (en)
French (fr)
Other versions
EP0228201B1 (de
EP0228201A3 (en
Inventor
Eishin Satake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsudakoma Corp
Original Assignee
Tsudakoma Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsudakoma Industrial Co Ltd filed Critical Tsudakoma Industrial Co Ltd
Publication of EP0228201A2 publication Critical patent/EP0228201A2/de
Publication of EP0228201A3 publication Critical patent/EP0228201A3/en
Application granted granted Critical
Publication of EP0228201B1 publication Critical patent/EP0228201B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B23Q7/14—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting co-ordinated in production lines
    • B23Q7/1426—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting co-ordinated in production lines with work holders not rigidly fixed to the transport devices
    • B23Q7/1431—Work holder changers

Definitions

  • the present invention relates to a pallet changer used for changing work pallets to be fed onto a machine tool, such as a machining center, and more particularly, to a hand-operated pallet changer.
  • a machine tool such as machining center
  • a pallet mounting portion provided with a clamping device for locating and clamping a work pallet on the mounting portion.
  • the work pallet is designed so that a work piece can be secured thereon.
  • a work pallet located on the mounting portion of the machine tool must be changed efficiently for a new one after the machining of the work piece on the work pallet located on the mounting portion of the machine tool is finished, and the work piece secured on the work pallet must be changed for a new one after the work pallet is removed from the mounting portion of the machine tool.
  • a pallet changer has been used for the above-mentioned changing operation of the work pallets.
  • a conventional pallet changer is generally designed to automatically change the work pallet, located on the mounting portion of the machine tool, by actuators driven by a hydraulic, pneumatic or electric power source, and accordingly, can dispence with unnecessary labor for the changing operation of the work pallets.
  • such an automatic pallet changer is expensive and is difficult to maintain and further, when such an automatic pallet changer is installed, additional electric wiring must be provided.
  • such an automatic work pallet changer requires an additional space for the installation of a hydraulic, pneumatic or electric power unit. Therefore, in a relatively small-­scale plant, it often becomes difficult to install the automatic pallet changer with a power unit after a machine tool has been installed, due to restrictions in installation space.
  • Another object of the present invention is to provide a hand-operated pallet changer which can be easily installed at an existing machine tool, such as a machining center, e.g., after the machine tool has been installed.
  • the present invention provides a hand-operated pallet changer for changing work pallets to be fed onto a pallet mounting portion of a machine tool, each of the work pallets being adapted to secure a work piece thereon, comprising: a base arranged in the vicinity of the machine tool; a turntable rotatably supported on the base unit and having at least two supporting portions for supporting the work pallets thereon, respectively, the supporting portions being spaced from each other in a rotational direction of the turntable; a table-indexing unit for stopping a rotational movement of the turntable and locking the turntable when each of the supporting portions of the turntable arrives at a predetermined position in which each of the sup­porting portions is in alignment with the pallet mounting portion of the machine tool; and a movable hook for preventing a rebound of the work pallet fed from the pallet mounting portion of the machine tool onto one of the supporting portions located at the predetermined position, the movable hook having a stopper portion for stopping the work pallet fed from the pallet mounting portion of the machine tool onto one of the supporting portions
  • the work pallet is fed from the mounting portion onto one of the supporting portions of the turntable by a hand operation when one of the supporting portions is locked at the predetermined position by the table-indexing unit.
  • the turntable can rotate freely when the table-­indexing unit releases the turntable, and the turntable can be then rotated by hand.
  • the movable hook is moved to release the work pallet supported on the supporting portion by a pushing force of the work pallet acting thereon.
  • the pallet indexing unit includes a first stopper unit supported on the base unit, and a plurality of second stopper units supported on the turntable and spaced from each other in the rotating direction of the turntable at the same intervals as those of the supporting portions, each of the second stopper units being movable between an engaging position in which the first stopper can catch and lock the second stopper unit when a corresponding supporting portion arrives at the predetermined position and a disengaging position in which the first stopper unit can not collide with the second stopper unit, each of the second stopper units being connected with the movable hook only when the corresponding supporting portion of the turntable is located at the predetermined position, and moved from one of the disengaging and engaging positions to the other position in accordance with the movement of the movable hook from one of the latching and releasing positions to the other position.
  • the second stopper unit of the table indexing unit is located at the engaging position and the first stopper unit can catch and lock the second stopper unit when the corresponding supporting portion of the turntable arrives at the predetermined position.
  • the second stopper unit is also connected with the movable hook located at the releasing position when the corresponding supporting portion of the turntable arrives at the predetermined position. The second stopper unit moves from the engaging position to the disengaging position in accordance with the movement of the movable hook, and thus the table-indexing unit releases the turntable when the movable hook moves from the releasing position to the latching position.
  • the supporting portion of the turntable is fixed to the predetermined position by the table-indexing unit until the movable hook latches the work pallet fed from the machine tool. Therefore, a feeding operation of the work pallet from the mounting portion of the machine tool onto the supporting portion of the turntable can be safely effected.
  • the first stopper unit of the table-indexing unit can stop and lock the second stopper unit supported on the turntable when the supporting portion of the turntable arrives at the predetermined position.
  • the table-indexing unit can move to lock and release the turntable in accordance with the respective movements of the movable hook between the engaging and disengaging positions without a specific hand operation other than a hand operation for feeding the work pallet from the mounting portion of the machine tool onto the supporting portion of the turntable and for rotating the turntable. Therefore, according to the above-mentioned preferred embodiment of the present invention, a pallet changing operation can be effected by only a very simple hand operation.
  • Figures l to 7 show a hand-operated pallet changer according to a preferred embodiment of the present invention applied to a machine tool such as machining center having a hand-operated pallet clamping device forming a pallet mounting portion.
  • the pallet clamping device and the pallet changer are denoted generally by reference numerals l0 and 50, respectively.
  • the main parts of the pallet changer are shown in Figs. 3, 4, and 7, respectively, and the main parts of the pallet clamping device are shown in Figs. 5 and 6, respectively.
  • the hand-operated pallet clamping device l0 comprises a base block ll secured to a work table l of the machine tool.
  • the base block ll can be located at a desired position on the work table l and fixed thereto by clasps l2 and tightening bolts l3.
  • the pallet clamping device l0 further comprises a clamping unit l4 for clamping a work pallet 2 on the base block ll, a locating unit l5 for locating the work pallet 2 on the base block ll, a latch unit l6 for preventing a rebound of the work pallet 2 fed onto the base block ll, and a hand-operating lever l7.
  • the clamping unit l4 is provided with a clamping plate l8, and the clamping plate l8 is provided with guide poles l9 fixed thereto. As shown in Fig. 2, the guide poles l9 extend downwardly from the clamping plate l8 and are slidably fitted into guide holes 20, respectively.
  • the clamping plate l8 is provided with a plurality of rollers 2l arranged in two rows along a feeding direction of the work pallet 2.
  • the feeding direction of the work pallet 2 is shown by an arrow W in Fig. l.
  • the uppermost portion of the outer circumferential surface of each of the rollers 2l is located above the upper surface of the clamping plate l8, and the lowermost portion of the outer circumferential surface of each of the rollers 2l is located above the under surface of the clamping plate l8.
  • the work pallet 2 is provided at the under surface thereof with a pair of legs 3 and 4 extending downwardly from the work pallet 2 and hori­zontally in the feeding direction of the work pallet 2.
  • the legs 3 and 4 are provided at the lower ends thereof with ribs 3a and 4a, respectively, extending inwardly from the legs 3 and 4.
  • the clamping plate l8 can move vertically in relation to the base block ll.
  • the clamping unit l4 is kept in an unclamped state, and the rollers 2l can come in contact with the work pallet 2 fed onto the pallet clamping device l0 to support the work pallet 2.
  • the under surface of the clamping plate l8 is located above the ribs 3a and 4a, and the under surfaces of the ribs 3a and 4a are located above the upper surface of the base block ll. Consequently, the work pallet 2 fed onto the pallet clamping device l0 can be smoothly guided by the rollers 2l.
  • the clamping unit l4 is brought to a clamping state, and the ribs 3a and 4a of the work pallet 2 are clamped by the clamping plate l8 and the base block ll between the under surface of the clamping plate l8 and the upper surface of the base block ll. At this time, the rollers 2l are separated from the under surface of the work pallet 2.
  • the base block ll is provided with an operating shaft 22 extending horizontally in a direction perpen­dicular to the feeding direction of the work pallet 2, and rotatably supported thereon.
  • the operating shaft 22 is provided at one end thereof with a hand-operated lever l7 fixed thereto.
  • the operating shaft 22 is provided with an eccentric cam 23 fixed thereto approximately at the center of the pallet clamping device l0.
  • the eccentric cam 23 is rotatably fitted into a link 24 which is pivotably supported on the clamping plate l8 through a pin 25.
  • the locating unit l5 comprises a pair of locating pins 26 which are slidably fitted into bosses 27 provided on the base block ll, respectively.
  • the bosses 27 are loosely fitted into holes 28 formed in the clamping plate l8, respectively.
  • the work pallet 2 is formed with locating holes 2a which can closely and slidably fit over the location pins 26, respectively.
  • the work pallet 2 can be located in place of the base block ll upon the engagement of the location pins 26 with the locating holes 2a.
  • the operating shaft 22 is provided with a pair of cams 29 for vertically shifting the locating pins 26.
  • the cams 29 are arranged adjacent to the locating pins 26, respectively, and rotatably mounted on the operating shaft 22.
  • the cam 29 has a pin 30 projecting radially therefrom and engaging with a notch 26a formed in the corresponding locating pin 26.
  • the cam 29 also has a sectorial slit 29a extending radially therethrough and circum­ferentially through a predetermined section.
  • the operating shaft 22 is provided with pins 3l fixed thereto and extending radially therefrom into the slits 29a of the cams 29, respectively. In the situation shown in Fig.
  • the hand-operated lever l7 is located at a position denoted by the reference character A, the top end of the locating pins 26 are inserted into the locating holes 2a of the work pallet 2, and the clamping unit l4 is in the clamping state.
  • the hand-operated lever l7 is moved from the position A to a position denoted by reference character B in Fig. 6, the operating shaft 22 and pins 3l fixed thereto are rotated together with the lever l7. Since the pins 3l are inserted into the slits 29a of the cams 29, the cams 29 and pins 30 fixed thereto are maintained at the position shown in Fig. 6, while the pins 3l move within the slits 29a of the cams 29.
  • the pins 3l act on the cams 29 to rotate together with the operating shaft 22, and ac­cordingly, the pins 30 of the cams 29 act on the locating pins 26 to move downwardly apart from the locating hole 2a of the work pallet 2.
  • the clamping unit l4 is in the unclamped state and the locating pins 26 are disengaged from the locating holes 2a of the work pallet 2. Therefore, the work pallet 2 can be fed out from the pallet clamping device l0.
  • the latch unit l6 comprises a movable hook 32 which is swingably supported though a pin 34 on a bracket 33 fixed to the base block ll.
  • the movable hook 32 is formed with a stopper 35 which abuts against a stationary hook 5 fixed to the work pallet 2, and with a projection 32a which engages with a groove 5a formed in the stationary hook 5 of the work pallet 2.
  • the movable hook 32 is located at a disengaging position, as illustrated by a solid line.
  • a push rod 36 is slidably supported on the base block ll in the longitudinal direction thereof.
  • An upper end of the push rod 36 abuts against the movable hook 32.
  • the operating shaft 22 is provided with a cam 37 fixed thereto and able to act on the lower end of the push rod 36 so as to move the push rod 36 toward the movable hook 32.
  • the cam 37 rotates together with the operating shaft 22 and acts on the lower end of the push rod 36 to move it toward the movable hook 32, and thus, the movable hook 32 is moved from the engaging position to the disengaging position against the stationary hook 5 of the work pallet 2 by a pushing force of the push rod 36.
  • the hand-operated lever l7 is located at the position A in Fig. 6, the top end of the cam 37 is located above the lower end of the push rod 36.
  • the hand-operated lever l7 is moved manually from the unclamping position B toward the clamping position A, and thus the operating shaft 22 is rotated together with the lever l7.
  • the locating pins 26 are inserted into the locating holes 2a of the work pallet 2 by a shifting force of the pin 30 of the cam 29 acting thereon, and thus the work pallet 2 is located in place of the pallet clamping device l0.
  • the clamping plate l8 is moved downwardly by a pushing-down force of the eccentric cam 23 acting on the link 24 joined to the clamping plate l8, and then the work pallet 2 is clamped by the clamping plate l8 on the base block ll.
  • the movable hook 32 is moved from the engaging position to the disengaging position against the stationary hook 5 of the work pallet 2 by a pushing force of the cam 37 acting on the movable hook 32 through the push rod 36 when the lever l7 is moved from the unclamping position B to the clamping position A.
  • the hand-operated lever l7 is moved manually from the clamping position A to the unclamping position B. Accordingly, the clamping unit l4 is changed from the clamped state into the unclamped state, and the locating pins 26 of the locating unit l5 are disengaged from the locating holes 2a of the work pallet 2.
  • the work pallet 2 can be fed from the clamping plate l8 of the pallet clamping device l0 toward the pallet changer 50 immediately after the hand-operating lever l7 is moved from the clamping position A to the unclamping position B.
  • the pallet changer 50 comprises a base unit 5l including an inner tubular column 53, an outer tubular column 54, and a base plate 52 fixed to the outer tubular column 54.
  • the outer surface of the inner tubular column 53 is formed with a plurality of annular grooves 53a arranged vertically at equidistant intervals.
  • the outer tubular column 54 is fixed to the inner tubular column 53 by tightening a plurality of clamping screws 55 which engage with one of the annular grooves 53a.
  • the height of the base plate 52 can be changed stepwise by selecting the groove 53a to be engaged with the clamping screws 55.
  • the position of the inner tubular column 53 can be adjusted vertically and horizontally by a plurality of fine adjusting screws 56 and 57.
  • a turntable 58 is arranged above the base plate 52 and rotatably supported thereon through a bearing 59.
  • the turntable 58 is provided with a screw shaft 6l rotatably supported thereto.
  • the screw shaft 6l extends downwardly from the turntable 58 through the base plate 52 and is screwed into a nut 60 fixed to the inner tubular column 53.
  • the height of the turntable 58 from the base plate 52 can be adjusted by rotating the screw shaft 6l is relation to the nut 60.
  • the turntable 58 has thereon two opposed supporting portions 62 and 63 for the work pallet 2, which are arranged at an angular interval of l80 degrees from each other in the rotational direction of the turntable 58.
  • a plurality of rollers 64 for supporting thereon the work pallet 2 and carrying the work pallet 2 in the radial direction of the turntable 58 are arranged on the turntable 58 along the opposite sides of each of the supporting portions 62 and 63 and rotatably supported on the turntable 58.
  • the work pallet 2 can be transferred between the pallet clamping device l0 and the supporting portions 62 and 63 of the turntable 58.
  • a work piece (not shown) on the work pallet 2 can be changed for a new one.
  • the base plate 52 is provided thereon with a junction guide unit 65 for supporting and carrying thereon the work pallet 2 between the clamping plate l8 of the pallet clamping device l0 and the turntable 58.
  • the middle guide unit 65 comprises a plurality of supporting rollers 65 arranged along the opposite sides thereof.
  • the pallet changer 50 further comprises an table-­indexing unit 67 for indexing a stop position of the turntable 58 so that the supporting portions 62 and 63 of the turntable 58 can stop at the first position C, and a movable hook 68 for preventing a rebound of the work pallet 2 fed onto the supporting portions 62 and 63 of the turntable 58 from the pallet clamping device l0.
  • the movable hook 68 is swingably supported on a bracket 69 fixed to the base plate 52 through a pin 70.
  • the work pallet 2 is provided at one end thereof with the stationary hook 5 fixed thereto, as described above, and at the other end thereof with another stationary hook 6 fixed thereto.
  • the position of the movable hook 68 can be changed between a latching position E (shown by solid line) in which the movable hook 68 engages with the stationary hook 6 of the work pallet 2 and a releasing position F (shown by two-dotted line) in which the movable hook 68 disengages from the stationary hook 6.
  • the movable hook 68 has two concavities formed at one side surface thereof (not shown), and the bracket 69 is provided with a ball (not shown) movably held therein and urged toward the side surface of the movable hook 68 by a spring force.
  • the movable hook 68 can be kept in the latching position E and the releasing position F by an engagement of the ball with the concavities of the movable hook 7l.
  • the movable hook 68 is provided with a stopper portion 74 which abuts against the stationary hook 6 of the work pallet 2 fed onto the turntable 58 from the pallet clamping device l0.
  • the stopper portion 74 of the movable hook 68 is pushed by the work pallet 2 fed onto the turntable 58, the position of the movable hook 68 changes from the releasing position F to the latching position E, and accordingly, a rebound of the work pallet 2 is prevented by an engagement of the movable hook 68 with the stationary hook 6 of the work pallet 2.
  • the stationary hook 6 of the work pallet 2 is provided at the opposite sides thereof with cams 7 for changing the position of the movable hook 68 from the latching position E to the releasing position F.
  • cams 7 When the supporting portions 62 and 63 of the turntable 58 are rotated away from the position C in either the clockwise or counterclockwise direction in Fig. l, one of the cams 7 acts on the movable hook 68 to change the position thereof from the latching position E to the releasing position F. Therefore, it is possible to operate the movable hook 68 without bindrance when the work pallet 2 is fed from the pallet clamping device l0 onto one of supporting portions 62 and 63 of the turntable 58 located at the position C.
  • the table-indexing unit 67 comprises a first stopper unit and two second stopper units.
  • the second stopper units comprise pin holders 75 fixed to the turntable 58 beneath the supporting positions 62 and 63, respectively, and indexing pins 76 slidably inserted into the pin holders 75 in the vertical direction, respectively.
  • the first stopper unit of the table-indexing unit 67 comprises a stopper holder 77 fixed to the base plate 52 and having a pair of cylindrical bores 77a extending horizontally in parallel to each other, and a pair of indexing stoppers 78 slidably inserted into the bores 77a of the stopper holder 77, respectively, as shown in Fig. 4.
  • Pins 80 fixed to the stopper holder 77 engage with elongated grooves 69 formed in the indexing stoppers 78 to limit the moving stroke of the indexing stoppers 78, respectively.
  • the stopper holder 77 is provided with springs 8l for urging the indexing stoppers 78 to protrude from the bores 78a of the stopper holder 77.
  • a space for receiving one of the indexing pins 76 is defined between the tip ends of the pair of indexing stoppers 78.
  • the indexing pins 76 are located on the turntable 58 so that when the supporting portions 62 and 63 are located at the position C, the corresponding indexing pins 76 are located between the tip ends of the indexing stoppers 78, respectively. As shown in Fig. 7, the indexing pin 76 is formed with a notch 82. The notch 82 moves in accordance with the vertical movement of the indexing pin 76. When the indexing pin 76 is located at a predetermined lower position G (shown by a solid line in Fig.
  • the height of the notch 82 from the base plate 52 is the same as that of the indexing stoppers 78, i.e., the indexing pin 76 is located at a disengaging position, and accordingly, the turntable 58 can rotate freely.
  • the indexing pin 76 is located at a predetermined upper position H (shown by a two-dotted line in Fig. 7)
  • the vertical position of the notch 82 deviates from that of the indexing stoppers 78, that is, the indexing pin 76 is located at an engaging position, and accordingly, the indexing stoppers 78 can catch and lock the indexing pin 76 when the corresponding supporting portion arrives at the position C.
  • the indexing stoppers 78 are formed at the tip portions thereof with inclined cam surfaces 78a, respectively.
  • the indexing pin 76 comes into contact with the inclined cam surface 78a of one of the indexing stoppers immediately before the corre­sponding one of the supporting portions 62 and 63 of the turntable 58 arrives at the position C, and the indexing pin 76 then pushes the indexing stopper 78 into the bore 77a of the stopper holder 77 against the force of the spring 8l.
  • the indexing pin 76 is located between the indexing stoppers 78 and restricted therebetween, whereby an indexing of the turntable 58 is concluded.
  • the second stopper unit of the table-indexing unit 67 further includes brackets 83 fixed to the turntable 58 beneath the supporting portions 62 and 63, and levers 83 swingably supported through pins 85 on the brackets 83, respectively, for changing the position of the indexing pins 76 between the lower engaging position G and the upper disengaging position H.
  • Each operating lever 83 is joined at one end thereof to the corresponding indexing pin 76 through a pin 86, and formed at the other end thereof with an engaging groove 87.
  • the movable hook 68 is provided with an engaging pin 88 fixed thereto which is able to engage with the engaging groove 87 of the operating lever 84.
  • each operating lever 84 is formed at one side surface thereof with two concavities 84a and 84b, and the corresponding bracket 83 is provided with a ball 89 (shown in Fig.
  • the operating lever 84 can be kept in the first and second positions J and K by engagement of the ball 89 with these concavities 84a and 84b, respectively.
  • the mode of operation of the operating lever 84 will now be described in more detail.
  • the operating lever 84 is located at the position K when the corre­sponding one of the supporting portions 62 and 63 of the turntable 58 is moved toward the position C, and thus the corresponding indexing pin 76 is located at the upper engaging position H.
  • the engaging groove 87 of the corresponding operating lever 84 comes into engagement with the engaging pin 88 of the movable hook 68 located at the releasing position F.
  • the turntable 58 is rotated manually.
  • the indexing pin 76 is moved away from the indexing stoppers 78 by a rotational movement of the turntable 58
  • the movable hook 68 is moved from the latching position E to the releasing position F by a pushing force of the cam 7 of the stationary hook 6 of the work pallet 2 acting thereon.
  • the operating lever 84 is moved from the first position J to the second position K, and thus the corresponding indexing pin 76 is moved from the lower disengaging position G to the upper engaging position H.
  • the engaging groove 87 of the operating lever 84 is disengaged from the engaging pin 88 of the movable hook 68 by a rotational movement of the turntable 58.
  • the base plate 52 is provided with a guide ring 90 fixed thereto.
  • the guide ring 90 engages with the stationary hook 6 of the work pallet 2 and prevents radial movement of the work pallet 2 while the supporting portions 62 and 63 of the turntable 58 move away from the position C.
  • the guide ring 90 has a notch 90a, and the movable hook 7l is located in the notch 90a, so that the stationary hook 6 of the work pallet 2 comes into engagement with the guide ring 90 immediately after the stationary hook 6 disengages from the movable hook 7l, as the turntable 58 is rotated.
  • the guide ring 90 has a relatively thin thickness in the vicinity of the notch 90a so that the stationary hook 6 of the work pallet 2 can easily engage with the guide ring 90.
  • the thickness of the guide ring 90 increases continuously in the circumferential direction away from the vicinity of the notch 90a, and the guide ring 90 has a maximum thickness at a position opposite to the notch 90a in the diametrical direction thereof so as to closely engage with the stationary hook 6 of the work pallet 2. Consequently, the work piece supported on the work pallet 2 can be easily changed when the work pallet 2 is located at the position D.
  • the turntable 58 is provided at the underside thereof with two projecting cams 9l fixed thereto, and the base plate 52 is provided with a damper 92 which acts on the projecting cams 9l to reduce the rotational torque to the turntable 58 when the supporting portions 62 and 63 of the turntable 58 approach the position C. Therefore, the table-indexing unit 67 is not subjected to an excessive impact force when stopping the turntable 58.
  • the latching unit 68 and indexing unit 67 are mechanically and automatically moved in accordance with the manual movement of the work pallet 2. There onlyfore, a change of the work pallet 2 can be easily and safely effected by using the pallet changer 50.
EP86309467A 1985-12-28 1986-12-04 Handbetätigter Palettenwechsler Expired - Lifetime EP0228201B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP293473/85 1985-12-28
JP60293473A JPH0657376B2 (ja) 1985-12-28 1985-12-28 パレツト交換装置

Publications (3)

Publication Number Publication Date
EP0228201A2 true EP0228201A2 (de) 1987-07-08
EP0228201A3 EP0228201A3 (en) 1988-11-23
EP0228201B1 EP0228201B1 (de) 1991-10-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86309467A Expired - Lifetime EP0228201B1 (de) 1985-12-28 1986-12-04 Handbetätigter Palettenwechsler

Country Status (4)

Country Link
US (1) US4717306A (de)
EP (1) EP0228201B1 (de)
JP (1) JPH0657376B2 (de)
DE (1) DE3682041D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2613969A1 (fr) * 1987-04-16 1988-10-21 Schwaebische Huettenwerke Gmbh Dispositif de changement de palettes comportant une table de maintien
EP0521316A1 (de) * 1991-07-04 1993-01-07 DECKEL MAHO GmbH Vorrichtung zum automatischen Palettenwechsel

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910007253B1 (ko) * 1986-10-04 1991-09-24 닛또 고오기 가부시기가이샤 팔렛트 첸저(Pallet Changer)
US5346051A (en) * 1993-07-29 1994-09-13 Midaco Corporation Quick change-over pallet system
DE4330915C1 (de) * 1993-09-11 1994-09-08 Steinel Bernhard Werkzeugmasch Palettenwechsler für Werkzeugmaschinen
JPH08117375A (ja) * 1994-10-21 1996-05-14 Terumi Ota ゲートボールのゲート装置
US6183188B1 (en) 1997-04-21 2001-02-06 Steven J. Randazzo Manually operated work pallet changer system
US6698999B2 (en) 2001-11-19 2004-03-02 Tenneco Automotive Operating Company, Inc. Dual rotating stock system
JP4342928B2 (ja) * 2003-12-25 2009-10-14 株式会社森精機製作所 工作機械の工具交換装置
EP1676670B1 (de) * 2004-12-29 2008-03-26 Doosan Infracore Co., Ltd. Palettenwechsler für eine Werkzeugmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2754095A1 (de) * 1977-01-17 1978-07-20 Oerlikon Buehrle Ag Palettenwechsler in fertigungsanlagen
FR2391812A1 (fr) * 1977-05-26 1978-12-22 Toyoda Machine Works Ltd Appareil de changement de palette pour machine-outil
DE2735149A1 (de) * 1977-08-04 1979-02-22 Fendt & Co Xaver Einrichtung an werkzeugmaschinen, insbesondere mehrspindelbohrmaschinen, zum schnellen auswechseln von grossen und/oder unhandlichen werkstueckspannvorrichtungen
JPS54158781A (en) * 1978-06-06 1979-12-14 Hitachi Seiki Co Ltd Pallet changer
FR2511626A1 (fr) * 1981-08-03 1983-02-25 Toyoda Machine Works Ltd Changeur de palettes porte-pieces pour machine-outil
JPS58160040A (ja) * 1982-03-16 1983-09-22 Toyoda Mach Works Ltd パレツトチエンジヤ

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FR2391812A1 (fr) * 1977-05-26 1978-12-22 Toyoda Machine Works Ltd Appareil de changement de palette pour machine-outil
DE2735149A1 (de) * 1977-08-04 1979-02-22 Fendt & Co Xaver Einrichtung an werkzeugmaschinen, insbesondere mehrspindelbohrmaschinen, zum schnellen auswechseln von grossen und/oder unhandlichen werkstueckspannvorrichtungen
JPS54158781A (en) * 1978-06-06 1979-12-14 Hitachi Seiki Co Ltd Pallet changer
FR2511626A1 (fr) * 1981-08-03 1983-02-25 Toyoda Machine Works Ltd Changeur de palettes porte-pieces pour machine-outil
JPS58160040A (ja) * 1982-03-16 1983-09-22 Toyoda Mach Works Ltd パレツトチエンジヤ

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PATENT ABSTRACTS OF JAPAN, vol. 7, no. 283 (M-263)[1428], 16th December 1983; & JP-A-58 160 040 (TOYODA KOKI K.K.) 22-09-1983 *

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FR2613969A1 (fr) * 1987-04-16 1988-10-21 Schwaebische Huettenwerke Gmbh Dispositif de changement de palettes comportant une table de maintien
GB2203678A (en) * 1987-04-16 1988-10-26 Schwaebische Huettenwerke Gmbh Pellet changing mechanism
GB2203678B (en) * 1987-04-16 1991-05-15 Schwaebische Huettenwerke Gmbh Pallet changing mechanism.
EP0521316A1 (de) * 1991-07-04 1993-01-07 DECKEL MAHO GmbH Vorrichtung zum automatischen Palettenwechsel

Also Published As

Publication number Publication date
DE3682041D1 (de) 1991-11-21
JPS62157755A (ja) 1987-07-13
EP0228201B1 (de) 1991-10-16
EP0228201A3 (en) 1988-11-23
JPH0657376B2 (ja) 1994-08-03
US4717306A (en) 1988-01-05

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